+100 Humans are creatures of habit and often the motivating force is not logic and reason; i.e. buggy whip manufacturers. Natural selection will be the moderator!

Do people really still hate on BIAB? I thought it was pretty well accepted as a method for all grain brewing these days. I guess I don't hang around on enough homebrewing forums these days to hear what stupid arguments are still popular.

Planning my next brew and I would like to have a go at BIAB. Any advice on the below would be appreciated! -Is the main advantage over extract the ability to use base malts? -it seems I only need a large bag outside of my existing equipment (10 gallon brew kettle). Can anyone recommend the preferred bag? -is there a chance that I'll get low efficiency and the extract process would have been better in this arena?

Yea, grab a bag and you're good to go. My BIAB efficiency has ranged from the 50s to 79% generally around 60% so extract definitely has higher efficiency but seeing as the cost of grain is less than extract it should even out. Double cracking the grain seems to help. I've done a few batches where I sparged to increase efficiency but that kind of takes away from the speed & simplicity that make the method so appealing - I can get a brew done in under 4hrs.

Since I usually brew session beers and only 2 or 3 gallons at a time it works great for me and my 8 gal kettle. I can even put the whole thing in my oven to try to avoid loosing heat during the mash. If you're going to brew a really high gravity beer and are worried about all the grain you could always add as much grain as you can comfortably fit in the bag then add some DME.